Dinner in honor of Nobel Prize Winners, 8:00PM. President John F. Kennedy (center) visits with guests in the East Room during a dinner in honor of Nobel Prize winners from the Western Hemisphere. Standing in center with President Kennedy (L-R): Nobel Prize winner and Leader of the Liberal Party of Canada, Lester B. Pearson; writer, Mary Welsh Hemingway (widow of Nobel Prize-winning author, Ernest Hemingway), back to camera; and Nobel Prize-winning author, Pearl S. Buck. Katherine Tupper Marshall (widow of Nobel Prize winner and former Secretary of State, General George C. Marshall), looks on from left. Other Nobel Prize winners pictured include: United Nations (UN) Undersecretary for Special Political Affairs, Dr. Ralph J. Bunche; chemist from Cornell University, Dr. Peter J. W. Debye; physicist from the University of California, Berkeley, Dr. Emilio Segré; physicist from the University of California, Berkeley, Dr. Owen Chamberlain; physicist from Harvard University, Dr. Georg von Béké